
class P{
    public static int a=0;
}
public class Test2 {
    public static void main(String[] args) {
        P p1=new P();
        P p2=new P();
        P p3=new P();
        p1.a+=5;
        p2.a+=4;
        p3.a+=2;
        p1.a-=8;
        System.out.println(P.a);
    }
}
